All Questions
1
question
5
votes
2
answers
416
views
How does the Sony 135 F2.8 [T4.5] STF twin aperture lens design work?
I stumbled across the Sony 135 F2.8 [T4.5] STF other day.
I have read through the review but I can't for the life of me figure out what the twin-aperture setup is supposed to do!